Kingdom Hearts: Birth by Sleep
Tested and working on PSP-1000 (5.50 GEN-D3) and PSP-2000 (5.50 GEN-D3).
Instructions:
Extract KHBBS.iso from archive to ISO directory on your Memory Stick. This can be done using WinRAR or Total Commander.
And remember these files are for the custom firmwares ONLY!
Enjoy & Have fun! :)